Time to feature dumb shit we Americans have built
Wait, gotta flip it
There we go. See the Sheridan was built in the late 60s to do two things. Be dropped from planes and be floated across rivers. Problem is, tanks, even light ones, are heavy. The mtal needed to protect the crew from small arms does add up and heavy things aren't so great at flying or floating.
So to combat this weight issue someone decided to just use aluminum instead, which did reduce the weight substantially. Unfortunately it made the tank about as bulletproof as Sonny Corleone's Lincoln (if you don't get this joke then please get off the internet, go watch The Godfather and come back. I'll wait)
Also, when aluminum burns, like say, when it's with with explosive shells, artillery or even napalm, the fumes are extremely toxic. So being trapped inside of a tank made of it while the enemy shoots at you is about as shitty of an assignment as you could get in an actual shooting war. This was amde worse by the cannon firing a 152mm caseless round that left a lot of flammable residue after a few shots, which could burn hot enough to warp the barrel and force the next round to blow the barrel apart or even worse, vent the highly toxic fumes back at the crew. So in our hopes to overcome these issues, the United States Dept of Defense decided to give it a guided rocket that fires out of the main cannon, the MGM-51 Shillelagh
We ordered a lot of these (88,000), and at about $4000 a pop, even in 1972 money, they were downright affordable for a DoD guided anything. Problem was, we would never, ever use them. These got brought in to Desert Storm, but never once got fired at anything other than paper targets. To their credit, the 15lbs of explosive charges in them could really fuck up a paper target. So what they ended up being was a really good practical training tool for Explosive Ordnance Disposal units to disarm and explode before heading to Iraq and Afghanistan.
Now, remember how this thing was made to be dropped out of planes? Well, they actually did this. The original idea is they'd push it out on a pallet with 4 parachutes attached at the corners and the crew, ammo and fuel inside. Luckily, an adult overheard this plan and made them stop even considering trying this with live humans in the tank. Instead, the new idea was that they'd just drag chute the fuckers, empty out of a low flying C-130 instead, with the ammo and fuel on seperate pallets and have a helicopter land with the crew. This proved to be safer for the crew, and equally as dangerous for the equipment (see picture at top)
That said, when it worked, it did look cool as fuck.